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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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    <script>
        // 3、2、4、1
        // #1
        setTimeout(() => {
            console.log(1);
        });

        Promise.resolve().then(() => {
            // #2
            console.log(2);
        });

        Promise.resolve().then(() => {
            // #3
            console.log(4);
        });
        console.log(3);
    </script>
</body>

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